Method for stabilizing humidity-sensitive pharmaceutical substance and stabilized preparation thereof

ABSTRACT

An object of the present invention is to provide a method for stabilizing a substance DFP-11207 sensitive to humidity and unstable at high humidity, and a stabilized preparation thereof, and more specifically, provide a capsule preparation for treating cancer, containing DFP-11207 or a pharmaceutically acceptable salt thereof and a hygroscopic agent.

TECHNICAL FIELD

The present invention relates to a method for pharmaceutically stabilizing a pharmaceutical substance, 5-chloro-2-(3-(3-(ethoxymethyl)-5-fluoro-2,6-dioxo-1,2,3,6-tetrahydopy-rimidine-1-carbonyl)benzoyloxy)pyridine-4-yl-2,6-bis(propionyloxy)isonicotinate) (hereinafter, referred to as “DFP-11207”), which is easily decomposed under the influence of humidity due to the presence of a large number of ester bonds in a molecule, and also relates to a stabilized preparation thereof.

BACKGROUND ART

DFP-11207 is a novel derivative of 5-fluorouracil (5-FU) and a candidate substance for a peroral anti-cancer drug (Patent Literature 1, Non Patent Literature 1, Non Patent Literature 2). 5-FU has been clinically applied mostly by intravenous infusion over a week (Non Patent Literature 3). Afterwards, oral preparations such as Xeloda (Non Patent Literature 4) and TS-1 (Non Patent Literature 5) have been clinically used.

TS-1 is a combination drug consisting of three components, that is, a 5-FU derivative, tegafur (FT); gimeracil (CDHP) inhibiting in-vivo metabolic degradation by dihydropyrimidine dehydrogenase; and oteracil potassium (OXO) inhibiting orotate phosphoribosyl transferase activity. TS-1 exerts an excellent therapeutic effect; however, the components are each individually absorbed from the intestinal wall. Due to this, side effects such as bone-marrow toxicity including reduced blood platelet count are produced. For the reason, TS-1 has room for improvement.

DFP-11207 is a single compound consisting of a 5-FU derivative, 1-ethoxymethyl-5-fluorouracil (EMFU), 5-chloro 2,4-dihydroxypyridine (CDHP) inhibiting enzymatic decomposition with dihydropyrimidine dehydrogenase, and citrazinic acid (CTA) inhibiting orotate phosphoribosyl transferase activity.

When DFP-11207 and TS-1 were each individually and orally administered in an experiment using animal models, i.e., cancer-bearing nude rats for use in estimating effects on cancer patients, the “area under the curve” (AUC) of drug concentration of 5-FU derived from DFP-11207 was the same as AUC of that of 5-FU derived from TS-1; however the maximum blood concentration (Cmax) of 5-FU derived from DFP-11207 was significantly lower than Cmax of 5-FU derived from TS-1. It is commonly known that AUC of 5-FU in the blood is likely to reflect medicinal effects of 5-FU; whereas, Cmax of 5-FU in the blood is likely to reflect side effects (particularly bone-marrow toxicity such as reduced blood platelet count). In this sense, it can be said that DFP-11207 is pharmacokinetically an excellent substance in balance between medicinal effects and side effects, compared to an existing medicine, TS-1. As a result that DFP-11207 and TS-1 were each individually and orally administered in experiments using cancer-bearing nude rats (which are optimal animal models for use in estimating medicinal effects on cancer patients) and therapeutic effects of them were compared, DFP-11207 was more excellent than TS-1 (Non Patent Literature 1). Excellent safety (none of serious gastrointestinal toxicity such as diarrhea and toxicity of reduced blood platelet count were observed) of DFP-11207 was also confirmed in the phase-I trial of DFP-11207, which was carried out in the M. D. Anderson Cancer Center in U.S. with patients having a solid cancer such as colorectal cancer, gastric cancer and pancreatic cancer (Non Patent Literature 2). In the case of TS-1, it is necessary for patients to take drug holidays in order to recover from side effect; however, in the case of DFP-11207, it is not necessary to take drug holidays or control a dosage amount depending on the body-surface area of a cancer patient (Non Patent Literature 2).

CITATION LIST Patent Literature

[Patent Literatures 1] Japanese Patent No. 5008778

Non Patent Literatures [Non Patent Literature 1] M. Fukushima et al., Drug Design, Development and Therapy (2017): 1693-1705 [Non Patent Literature 2] J. Ajani et al., Investigational New Drugs(2020): 1763-1773 [Non Patent Literature 3] Heidelbelger et al., Cancer Research (1963): 1226-1243 [Non Patent Literature 4] H. Ishitsuka et al., Biochemical Pharmacology (1998): 1091-1097 [Non Patent Literature 5] M. Fukushima et al., Cancer Research (1996): 2602-2606 SUMMARY OF INVENTION Technical Problem

The present inventors found that DFP-11207 is a clinically excellent anti-cancer drug candidate substance but it is not easily stored for a long term because DFP-11207 is sensitive to humidity (in other words, humidity reduces stability) due to the presence of a large number of ester bonds in a molecule.

DFP-11207 is a single compound formed by linking EMFU slowly releasing 5-FU, CDHP suppressing in-vivo metabolic decomposition of 5-FU and CTA suppressing gastrointestinal serious toxicity (e.g., diarrhea) of 5-FU, via, e.g., an ester bond. When DFP-11207 is orally administered, DFP-11207 is metabolized into EMFU, CDHP and CTA in the intestinal tissue. EMFU slowly releases 5-FU in the blood and CDHP inhibits metabolic decomposition of 5-FU in the blood. Since the concentration of 5-FU in the blood is maintained in this mechanism, the anti-tumor effect of 5-FU is enhanced. Whereas, CTA mostly stays within the intestinal tissue to reduce 5-FU induced gastrointestinal toxicity.

As mentioned above, DFP-11207 is a highly functional substance because of a combination of functional substances, that is, EMFU slowly releasing 5-FU, CDHP inhibiting enzymatic decomposition of 5-FU and CTA reducing toxicity caused by 5-FU in the gastrointestinal tissue, in a molecule; however, DFP-11207 is sensitive to humidity.

An object of the present invention is to provide a method for stabilizing DFP-11207, which is a substance sensitive to humidity and unstable at high humidity, and provide a stabilized preparation thereof.

Solution to Problem

The present inventors have intensively conducted studies with a view to solving the aforementioned problems. As a result, they have found that a humidity-sensitive substance, DFP-11207, can have an improved stability and be stored for a long term in a room or a refrigerator by formulating DFP-11207 together with a hygroscopic agent into a capsule preparation, and providing the capsule preparation in a container together with a drying agent.

The present invention was attained based on these new findings and the following inventions are included.

[1] A capsule preparation for treating cancer, comprising DFP-11207 or a pharmaceutically acceptable salt thereof and a hygroscopic agent.

[2] The capsule preparation according to [1], wherein the hygroscopic agent include colloidal silicon dioxide and microcrystalline cellulose.

[3] The capsule preparation according to [1] or [2], which comprises the DFP-11207 or a pharmaceutically acceptable salt thereof in an amount of 25 to 65 wt %, the microcrystalline cellulose in an amount of 35 to 75 wt % and the colloidal silicon dioxide in an amount of 2 to 5 wt %.

[4] The capsule preparation according to any one of [1] to [3], which comprises the DFP-11207 or a pharmaceutically acceptable salt thereof in an amount of 100 mg.

[5] The capsule preparation according to any one of [1] to [4], wherein a coating base for a capsule shell thereof contains hydroxypropyl methylcellulose.

[6] The capsule preparation according to any one of [1] to [5], which has a capsule size of 2 to 00.

[7] The capsule preparation according to any one of [1] to [6], which is provided in a container together with a drying agent.

[8] A method for producing a capsule preparation for treating cancer, comprising filling a capsule shell with DFP-11207 or a pharmaceutically acceptable salt thereof and a hygroscopic agent.

[9] The method according to [8], wherein the hygroscopic agent includes colloidal silicon dioxide and microcrystalline cellulose.

[10] The method according to [8] or [9], wherein the capsule shell is filled with DFP-11207 or a pharmaceutically acceptable salt thereof in an amount of 25 to 65 wt %, microcrystalline cellulose in an amount of 35 to 75 wt % and a colloidal silicon dioxide in an amount of 2 to 5 wt %.

[11] The method according to any one of [8] to [10], wherein the capsule shell is filled with DFP-11207 or a pharmaceutically acceptable salt thereof in an amount of 100 mg.

[12] The method according to any one of [8] to [11], wherein a coating base for the capsule shell contains hydroxypropyl methylcellulose.

[13] The method according to any one of [8] to [12], wherein the capsule shell has a capsule size of 2 to 00.

[14] The method according to any one of [8] to [13], further comprising a step of providing the produced capsule preparation in a container together with a drying agent.

Advantageous Effects of Invention

According to the present invention, it is possible to provide a method for stabilizing DFP-11207, which is a substance sensitive to humidity and unstable at high humidity, and a stabilized preparation thereof. According to the present invention, DFP-11207 is a high-functional substance obtained by linking a functional substance (EMFU) slowly releasing 5-FU, a functional substance (CDHP) inhibiting a 5-FU degrading enzyme and a functional substance (CTA) suppressing 5-FU induced gastrointestinal toxicity, via e.g., an ester bond and an active amido bond, in a molecule. Since DFP-11207, is a substance sensitive to humidity and unstable, if a method for stabilizing DFP-11207 (sensitive to humidity and an unstable substance) by suppressing movement of water molecules is invented, it is possible to provide a DFP-11207 preparation that can be stored for a long term and free from problems of transport.

DESCRIPTION OF EMBODIMENTS

The present invention relates to a capsule preparation for treating cancer, containing DFP-11207 or a pharmaceutically acceptable salt thereof and a hygroscopic agent.

In the present invention, “DFP-11207” is a compound represented by the following formula 1:

obtained by linking a 5-FU derivative, 1-ethoxymethyl-5-fluorouracil (EMFU), 5-chloro 2,4-dihydroxypyridine (CDHP) inhibiting enzymatic decomposition with dihydropyrimidine dehydrogenase, and citrazinic acid (CTA) inhibiting activity of orotate phosphoribosyl transferase, via an ester bond and an active amide bond. The “DFP-11207” to be used in the present invention may be a product produced in accordance with a method commonly known in the technical field (for example, Japanese Patent No. 5008778, M. Fukushima et al., (2017); J. Ajani et al., (2020) listed in the above) or a commercially available product.

In the present invention, the “pharmaceutically acceptable salt thereof” refers to a salt that can be administered to living bodies. Examples of the pharmaceutically acceptable salt include, but are not limited to, a hydrochloride, a sulfate, a nitrate, a phosphate, a hydrobromide, a carbonate, an acetate, a trifluoroacetate, a p-toluene sulfonate, a propionate, a tartrate, a fumarate, a malate, a maleate, a citrate, a methanesulfonate, an alkali metal salt (e.g., sodium salt, potassium salt), an alkaline earth metal salt (e.g., calcium salt), a magnesium salt and an ammonium salt.

In the present invention, the “hygroscopic agent” is not particularly limited as long as it is a pharmaceutically acceptable (more specifically, can be administered to living bodies) and it absorbs moisture. Examples of the hygroscopic agent include microcrystalline cellulose, colloidal silicon dioxide, hydroxyethyl cellulose, hydroxypropyl methylcellulose, hydroxypropyl cellulose, hydroxyethyl methyl cellulose, carboxypolymethylene, methyl cellulose, ethyl cellulose, dextran, carboxymethyl starch, starch, calcium silicate, magnesium silicate, talc, polyvinylpyrrolidone, polyvinyl alcohol, thaumatin, sodium polyphosphate, phthalic anhydride, maleic anhydride, anhydrous sodium dihydrogen phosphate and sodium metaphosphate. One or a plurality of hygroscopic agents selected from these can be used. The “hygroscopic agent” in the present invention preferably includes microcrystalline cellulose and/or colloidal silicon dioxide, and more preferably, microcrystalline cellulose and colloidal silicon dioxide are used. In the present invention, movement of water molecules can be suppressed by the content of the “hygroscopic agent”, with the result that stability of DFP-11207 or a pharmaceutically acceptable salt thereof to humidity can be enhanced.

In an embodiment, the capsule preparation of the present invention may contain 25 to 65 wt % of DFP-11207 or a pharmaceutically acceptable salt thereof and 35 to 75 wt % of a hygroscopic agent.

In another embodiment, the capsule preparation of the present invention may contain 25 to 65 wt % of DFP-11207 or a pharmaceutically acceptable salt thereof, 35 to 75 wt % of microcrystalline cellulose and 2 to 5 wt % of colloidal silicon dioxide. For example, the capsule preparation of the present invention may contain 100 mg of DFP-11207 or a pharmaceutically acceptable salt thereof, 56.8 mg to 292 mg of microcrystalline cellulose and 3.2 mg to 8 mg of colloidal silicon dioxide.

The capsule preparation of the present invention may optionally further contain an appropriate additional component commonly used for producing medical drugs, such as an excipient, a binder, a disintegrant, a lubricant, a diluent, a stabilizer, a tonicity agent, a pH regulator, a buffer, a dissolution aid, a suspension agent, a colorant, a preservative, an antiseptic agent or an antioxidant. DFP-11207 or a pharmaceutically acceptable salt thereof and a hygroscopic agent to be contained in the capsule preparation may be formed into, e.g., a powder or a granule, by themselves or together with other components (additives).

In the present invention, the coating for the capsule shell may comprise, or consist of, one or more bases commonly used in producing the coating. Examples of the base for the capsule coating include, but are not limited to, hydroxypropyl methylcellulose (HPMC), hydroxypropyl cellulose, methyl cellulose, carboxymethyl cellulose, agar, carrageenan, alginic acid, ghatti gum, gum Arabic, pullulan, Welan gum, xanthan gum, gellan gum, gum tragacanth, pectin, glucomannan, starch, polydextrose, dextrin, maltodextrin, cyclodextrin, indigestible dextrin, guar gum, tara gum, tamarind seed gum, locust bean gum, psyllium seed gum, Linseed gum, gelatin, casein, zein, sorbitol, maltitol, lactitol, Palatinit, xylitol, mannitol, galactitol and erythritol. In the present invention, the coating for the capsule shell preferably comprises or consists of HPMC.

The size of the capsule shell is not particularly limited as long as the size is good enough to house DFP-11207 or a pharmaceutically acceptable salt thereof, and a hygroscopic agent as mentioned above, and optionally an additional component, and suitable for oral administration. According to, e.g., the description of the Japanese Pharmacopoeia, the size of the capsule falls in the range of 000 (reference capacity: 1 g) to 5 (reference capacity: 0.03 g), preferably 00 (reference capacity: 0.5 g) to 4 (reference capacity: 0.06 g) such as 00 (reference capacity 0.5 g) to 3 (reference capacity 0.12 g), and more preferably 00 (reference capacity 0.5 g) to 2 (reference capacity: 0.2 g).

The capsule shell may have any one of forms: hard capsule shell, soft capsule shell and seamless capsule shell, and preferably hard capsule shell. The capsule shell may be colored or not, and transparent, translucent or opaque, and preferably, colored opaque capsule shell.

The capsule preparation of the present invention can be produced in accordance with a method for producing a capsule preparation commonly known in the technical field. More specifically, the capsule preparation can be produced by filling a capsule shell with DFP-11207 or a pharmaceutically acceptable salt thereof, and a hygroscopic agent as mentioned above, and optionally an additional component, for encapsulation.

The capsule preparation produced can be provided in a container together with a drying agent, and can be supplied, transported, sold and stored in the form.

In the present invention, the “container” may be any one of “hermetic container”, “tight container” and “well-closed container” (defined by the Japanese Pharmacopoeia, 17th edition, general principle); and is preferably a moisture-proof container that can prevent moisture from entering. The container is preferable attached with a child-resistant cap.

The container may have any shape such as a bottle, a bag and a box, but the shape of the container is not limited to these. The container that can be used is formed of a highly moisture-proof material such as glass, a metal or a resin (e.g., polyethylene, polypropylene). The container is colored or not, and transparent, translucent or opaque, and preferably, a colored opaque container. The volume of the container, although it is not particularly limited, can be, for example, 50 to 500 mL (commonly, 50 mL, 100 mL, 150 mL, 180 mL, 200 mL, 250 mL, 300 mL, 350 mL, 400 mL, 450 mL or 500 mL), and preferably 100 to 200 mL.

In the present invention, examples of the “drying agent” include silica gel, alumina gel, zeolite, alumina, bauxite, anhydrous calcium sulfate, calcium chloride, lithium chloride, magnesium chloride, lime, clay, zeolite, talc, diatomaceous earth, white clay, carbon black, a high water-absorption resin, a synthetic resin powder, a sulfate, a carbonate, a hydroxide, an oxide, a chloride and a phosphate. The drying agents selected from these can be used singly or in combination. The form of the drying agent is not particularly limited. The drying agent can be packaged in a sachet, a pouch or a pack, and provided in a container together with a capsule preparation.

The amount of the drying agent to be contained in a container can be appropriately controlled in accordance with factors such as the amount and size of the capsule preparation, the size, shape and material of a container and the type of drying agent. For example, the drying agent of about 0.5 g to 10 g (e.g., 1 g to 8 g, 2 g to 5 g) per 100 mL of the volume of a container can be used. In an embodiment, 3 g of silica gel can be provided together with 50 capsules containing the preparation of the present invention in a white bottle (capacity 150 mL) made of high-density polyethylene.

The capsule preparation of the present invention has high stability compared to a single substance, DFP-11207 or a pharmaceutically acceptable salt thereof. In particular, the capsule preparation of the present invention can be more stable by providing it in a container together with a drying agent and can be stored at room temperature (25° C./humidity 50%) or in refrigerator (5° C.). The capsule preparation of the present invention can be highly stable for a long term (for example, 1 month or more, 2 month or more, 3 month or more, 4 month or more, 5 month or more, 6 month or more, 7 month or more, 8 month or more, or 9 month or more; and 84 month or less, 72 month or less, 60 month or less, 48 month or less, 36 month or less, 24 month or less, 18 month or less, or 12 month or less, although the upper limit is not particularly limited) particularly in low-temperature condition (e.g., 1 to 5° C.) within a refrigerator or the like. In the present invention, “be highly stable” means that denaturation or decomposition of a compound rarely or never occurs. This more specifically means that the purity measured by means of e.g., high performance liquid chromatography can be maintained at 90% or more, for example, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, or 99% or more.

The capsule preparation of the present invention is orally administered to cancer patients. The dosage amount may vary depending on factors such as the age, body weight and/or symptom of a patient, the type and/or severity of cancer and is an amount sufficient to treat cancer. The dosage amount of the capsule preparation of the present invention, more specifically, the amount of an active ingredient, DFP-11207 or a pharmaceutically acceptable salt thereof, is 50 mg to 500 mg, preferably 100 mg to 400 mg and more preferably 200 mg to 300 mg per day. The dosage amount selected from them can be administered once a day or is divided to two or more portions per day. The frequency of administration is once a day or 2 to 3 days, once a week, or once per 1 to 3 weeks.

In the present invention, the phrase “treat cancer” means reaching the state where cancer has completely disappeared. Other than this, the phrase means reaching the state where cancer temporarily or permanently shrinks or disappears and the state where cancer is in stable condition without worsening. For example, the phrase includes one or more phenomena such as reduction of cancer tumor-size, reduction of level of a tumor marker, symptomatic improvement of cancer, and extension of overall survival, progression-free survival or median survival used as a measure.

When DFP-11207 or a pharmaceutically acceptable salt thereof is orally administered, it is metabolized into EMFU slowly releasing 5-FU, CDHP serving as a 5-FU decomposition inhibitor, and CTA suppressing a toxicity to the lower gastrointestinal tract such as serious diarrhea, in the tissue of the lower gastrointestinal tract. After passing the lower gastrointestinal tract, EMFU slowly releases an anti-cancer active substance, 5-FU; and CDHP inhibits enzymatic decomposition of 5-FU with dihydropyrimidine dehydrogenase. In contrast, CTA stays in the tissue of the lower gastrointestinal tract and inhibits the activity of orotate phosphoribosyl transferase of the tissue. In this mechanism, 5-FU produces a maximum therapeutic effect while reducing 5-FU induced toxicity (e.g., serious diarrhea) to the lower gastrointestinal tract. For the reason, DFP-11207 or a pharmaceutically acceptable salt thereof can be extremely superior to existing 5-FU anti-cancer agents.

In the present invention, DFP-11207 is the same 5-FU series anti-cancer agent as 5-FU, TS-1 and Xeloda. Accordingly, examples of a target cancer for treatment include colorectal cancer, gastric cancer, esophageal cancer, pancreatic cancer, hepatocellular carcinoma, gallbladder cancer, gallbladder cancer, biliary tract cancer, breast cancer, ovarian cancer, breast cancer, cervical cancer, endometrial cancer, cervical cancer, and head and neck cancer. Since DFP-11207 has CDHP, which inhibits decomposition with dihydropyrimidine dehydrogenase (DPD) in a molecule, non-small cell lung cancer having a strong DPD activity can be included as a treatment target.

The capsule preparation of the present invention is characterized by having few side effects frequently associated with a 5-FU series anti-cancer agent, such as serious diarrhea, reduced white blood cell count, reduced neutrophil count and reduced platelet count.

The present invention will be more specifically described with reference to Examples but the technical scope of the present invention is not limited by these Examples.

EXAMPLES Example 1 Capsule Preparation (100 mg) of DFP-11207 According to First Prescription

Table 1 shows the types/amounts of components of a capsule preparation (100 mg) of DFP-11207 according to the first prescription, and packages thereof.

The capsule preparation of DFP-11207 (100 mg) was prepared in accordance with the first prescription. White and opaque HMPC hard capsules of No. 2 in size were filled with DFP-11207 (100 mg), microcrystalline cellulose (56.8 mg) and colloidal silicon dioxide (3.2 mg) to prepare 50 capsule preparations. The capsule preparations were put in a 150-cc bottle made of high-density polyethylene (HDPE) with a 38-mm diameter mouth, and having 3 bags of silica gel (1 g per bag) for drying purpose placed therein. The bottle was closed with a child resistant cap.

TABLE 1 Types and amounts of components of capsule preparations of DFP-11207 (100 mg) according to the first prescription and packages thereof 100-mg Capsule of DFP-11207 Component Manufacturer mg/capsule % w/w DFP-11207 — 100.0 62.5 Microcrystalline FMC 56.8 35.5 cellulose PH112, NF/EP/JP Colloidal silicon Evonik 3.2 2.0 dioxide, NF/EP/JP Filler content/capsule 160.0 100.0 Capsule Qualicaps Size: No. 2 (white and opaque hard capsule made of HMPC) Bottle filled Drug & Child-resistant packaged 150-cc with capsules Plastics HDPE bottle with a 38 mm-diameter mouth Texas Bag containing silica gel (1 g) for Technology drying purpose Package Fifty capsules (100 mg)(silica gel (3 g) for drying purpose) per bottle

Table 2 shows long-term stability of a capsule preparation of DFP-11207 (100 mg) according to the first prescription at 5° C. and collection time (analysis time) of samples to be subjected to stability tests in acceleration conditions (25° C./humidity 60%) and severe conditions (30° C./humidity 65%).

TABLE 2 Analysis time of stability test samples of a capsule preparation of DFP-11207 (100 mg) according to the first prescription Number of test bottles Number Number Total Analysis time (month) of bottles of bottles number of Conditions 0 1 2 3 6 9 12 18 24 36 48 60^(c) tested maintained bottles  5° C. A A A A A A A A A 8 5 13 25° C./60% RH A A A A A A A A 8 4 12 30° C./65% RH A A A A A A 6 3  9 Whole sum of test bottles 34

Table 3 shows specifications of a capsule preparation of DFP-11207 (100 mg) according to the first prescription, stability test method (appearance (white, grayish white or cream) and purity (90% to 110%)) thereof and designation of test group. The purity was measured by high performance liquid chromatography (the same applies to the following tests).

TABLE 3 Specifications of a capsule preparation of DFP-11207 (100 mg) according to the first prescription, stability test method and designation of test group Number of test bottles Test Characteristics Method Specifications group A Appearance ATM-1095 White, grayish white, 1 cream color capsule Purity ATM-1349 90.0-110.0% Analog ATM-1349 Individual related compounds: ≥0.1% (% area) Total: measured value Water USP <921> Measured value content la Disintegration USP Six individual disintegration time <701> times and their average Whole sum of test bottles 1

Table 4-1 and Table 4-2 show data of a long-term stability test of a capsule preparation of DFP-11207 (100-mg) according to the first prescription, performed at 5° C.

Note that, hereinafter, “analog 1” is a compound represented by the following formula 2:

“Analog 2” is a compound represented by the following formula 3:

“Impurity 1” is a compound represented by the following formula 4:

“Impurity 2” is a compound represented by the following formula 5:

“Impurity 3” is a compound represented by the following formula 6:

As shown in the results, the purity obtained after 48-month storage at 5° C. was 94.8% (within a reference range of 90.0 to 110.0). It was confirmed that the capsule preparation has stability for 48 months.

TABLE 4-1 Stability (at 5° C.) of capsule preparation of DFP-11207 (100 mg) according to the first prescription in real time Specifications 0 month 3 months 6 months 9 months 12 months 18 months Analysis date Test Method 2016 Nov. 9 2017 Feb. 2 2017 May 10 2017 Aug. 10 2018 Aug. 12 Appear- ATM- White, Grayish-white Grayish-white Grayish-white Grayish-white Grayish-white Grayish-white ance 1095 grayish- white or cream color Purity ATM- 90.0- 99.3% 99.4% 97.4% 100.4% 98.4% 99.0% 1349 110.0% Analog ATM- Measured Analog 1: 0.1% Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.1% 1349 value ≥ 0.1% RRT 0.47: 0.1% Analog 11: 0.1% Analog 1: 0.1% Analog 1: 0.1% Analog 1: 0.1% Analog 1: 0.1% (Individual Impurity 1: 0.1% RRT 0.46: 0.1% RRT 0.48: 0.1% Impurity 1: 0.1% RRT 0.46: 0.1% RRT 0.46: 0.1% related RRT 0.61: 0.1% Impurity 1: 0.2% Impurity 1:0.1% Impurity 2: 0.5% Impurity 1: 0.1% Impurity 1: 0.2% compounds): Impurity 2: 0.4% Impurity 2: 0.5% RRT 0.61: 0.1% RRT 0.79: 0.1% RRT 0.60: 0.1% Impurity 2: 0.5% % area Impurity 3: 0.4% RRT 0.79: 0.2% Impurity 2: 0.5% Impurity 3: 0.4% Impurity 2: 0.5% RRT 0.79: 0.1% Total: RRT 0.88: 0.2% Impurity 3: 0.5% RRT 0.80: 0.1% RRT 0.87: 0.2% RRT 0.79: 0.1% Impurity 3: 0.4% measured RRT 0.90: 0.1% RRT 0.87: 0.2% Impurity 3: 0.4% RRT 0.88: 0.1% Impurity 3: 0.5% RRT 0.87: 0.2% value RRT 0.92: 0.2% RRT 0.91: 0.1% RRT 0.88: 0.2% RRT 0.91: 0.1% RRT 0.87: 0.2% RRT 0.90: 0.1% RRT 0.94: 0.2% RRT 0.93: 0.1% RRT 0.91: 0.1% RRT 0.93: 0.1% RRT 0.90: 0.1% RRT 0.91: 0.1% RRT 1.03: 0.2% RRT 1.04: 0.1% RRT 0.92: 0.1% RRT 1.03: 0.1% RRT 0.91: 0.1% RRT 0.93: 0.2% Impurity 4: 0.3% Impurity 4: 0.3% RRT 0.94: 0.1% Impurity 4: 0.3% RRT 0.93: 0.1% RRT 1.04: 0.2% Total: 2.4% Total: 2.5% RRT 1.03: 0.2% Total: 2.2% RRT 1.04: 0.1% Impurity 4: 0.3% Impurity 4: 0.3% Impurity 4: 0.3% Total: 2.6% Total: 2.5% Total: 2.5% Water USP Measured  1.6%  1.1%  1.2%  1.3%  1.5%  1.2% content <921> value Ia Disinte- USP Measured 1:59, 1:51, 1:38 1:34, 1:31, 1:34 1:37, 2:15, 2:23 1:25, 1:30, 1:32, 1:40, 1:50, 1:57, 1:30, 1:33, 1:40, gration <701> value 1:51, 1:59, 2:14 1:32, 1:28, 1:37 2:26, 2:26, 2:41 1:33, 1:35, 1:40  2:04, 2:08, 2:2   1:42, 1:45, 1:50  time Average value: Average value: Average value: Average value: Average value: Average value: 1:55 1:33 2:18 1:33 2:00 1:40 Note) Relative Retention Time (Relative elution time) of RRT:HPLC (High performance liquid chromatography)

TABLE 4-2 Stability (at 5° C.) of capsule preparation of DFP-11207 (100 mg) according to the first prescription in real time Specifications 24 months 36 months 48 months 60 month Test Analysis date item Method 2018 Aug. 10 2019 Aug. 12 2020 Aug. 10 Appear- ATM- Grayish-white Grayish-white Grayish-white ance 1095 Purity ATM- 90.0- 102.9% 100.5% 94.8% 1349 110.0% Analog ATM- Measured Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.2% 1349 value ≥ 0.1% Analog 1: 0.1% Analog 1: 0.1% Analog 1: 0.2% (Individual RRT 0.46: 0.1% RRT 0.46: 0.1% RRT 0.46: 0.1% related Impurity 1: 0.2% Impurity 1: 0.2% Impurity 1: 0.4% compounds): RRT 0.61: 0.1% RRT 0.61: 0.1% RRT 0.61: 0.1% % area Impurity 2: 0.6% Impurity 2: 0.6% Impurity 2: 1.5% Total: RRT 0.79: 0.1% RRT 0.79: 0.2% RRT 0.79: 0.2% measured Impurity 3: 0.4% Impurity 3: 0.5% Impurity 3: 0.4% value RRT 0.87: 0.2% RRT 0.87: 0.2% RRT 0.87: 0.3% RRT 0.89: 0.1% RRT 0.90: 0.1% RRT 0.88: 0.1% RRT 0.90: 0.2% RRT 0.91: 0.1% RRT 0.90: 0.1% RRT 0.91: 0.2% RRT 0.93: 0.1% RRT 0.91: 0.1% RRT 0.93: 0.2% RRT 1.04: 0.1% RRT 0.93: 0.1% RRT 1.04: 0.2% RRT 1.06: 0.1% RRT 1.04: 0.1% Impurity 4: 0.3% Impurity 4: 0.3% RRT 1.06: 0.1% Total: 3.1% RRT 1.24: 0.1% Impurity 4: 0.3% Total: 3.0% RRT 1.24: 0.1% Total: 4.4% Water USP Measured  1.5%  1.7%  2.0% content <921> value Ia Disinte- USP Measured 1:15, 1:18, 1:20, 1:40, 1:20, 1:24, 1:29, 1:31, 1:40, gration <701> value 1:30, 1:40, 1:45  1:27, 1:30, 1:15  1:46, 1:47, 1:56  time Average value: Average value: Average value: 1:28 1:26 1:42

Table 5 shows stability test data of capsule preparation of DFP-11207 (100 mg) according to the first prescription in acceleration conditions (25° C./humidity 60%).

As shown in the results, it was confirmed that the capsule preparation is stable for 6 months. The purities in the 9th month and 12th month were both lower than the specified value (90% to 110%). Stability was not confirmed.

TABLE 5 Stability of capsule preparation of DFP-11207 (100 mg) according to the first prescription in acceleration conditions (25° C./60 RH) Specifications 18 24 0 month 1 month 2 months 3 months 6 months 9 months 12 months months months Analysis date Test Method 2016 Sep. 12 2016 Oct. 10 2016 Nov. 19 2017 Feb. 8 2017 May 10 2017 Aug. 10 Ap- ATM- White, Grayish- Grayish- Grayish- Grayish- Grayish- Grayish- Cream pear- 1095 grayish- white white white white white white color ance white or cream color Pur- ATM- 90.0- 99.3% 98.6% 98.5% 93.7%** 97.4% 85.8%, 89.7%. 76.9% ity 1349 110.0% 83.5%, 88.9% Ana- ATM- Meas- Analog 1: Analog 2: Analog 2: Analog 2: Analog 2: Analog 2: Analog 2: log 1349 ured 0.1% 0.2% 0.2% 0.3% 0.4% 1.9% 4.5% value ≥ RRT 0.47: RRT 0.37: Analog 1: Analog 1: RRT 0.37: RRT 0.31: RRT 0.31: 0.1% 0.1% 0.1% 0.2% 0.2% 0.1% 0.3% 1.0% (Indi- Impurity 1: Analog 1: RRT 0.45: RRT 0.46: Analog 1: RRT 0.33: RRT 0.33: vidual 0.1% 0.1% 0.1% 0.1% 0.4% 0.1% 0.2% related RRT 0.61: RRT 0.45: Impurity 1: Impurity 1: RRT 0.48: RRT 0.36: RRT 0.36: com- 0.1% 0.1% 0.3% 0.3% 0.1% 0.2% 0.3% pounds): Impurity 2: Impurity 1: RRT 0.59: Impurity 2: Impurity 1: Analog 1: Analog 1: % area 0.4% 0.2% 0.1% 1.1% 0.5% 1.0% 1.8% Total: Impurity 3: RRT 0.59: Impurity 2: RRT 0.79: RRT 0.61: Impurity 1: Impurity 1: meas- 0.4% 0.1% 0.8% 0.1% 0.1% 1.4% 1.5% ured RRT 0.88: Impurity 2: RRT 0.79: Impurity 3: Impurity 2: RRT 0.55: RRT 0.49: value 0.2% 0.6% 0.1% 0.4% 1.8% 0.1% 0.1% RRT 0.90: RRT 0.79: Impurity 3: RRT 0.87: RRT 0.80: Impurity 2: RRT 0.55: 0.1% 0.1% 0.4% 0.2% 0.3% 4.0% 0.4% RRT 0.92: Impurity 3: RRT 0.87: RRT 0.91: Imp-3: RRT 0.79: RRT 0.60: 0.2% 0.4% 0.2% 0.1% 0.4% 0.5% 0.1% RRT 0.94: RRT 0.87: RRT 0.89: RRT 0.93: RRT 0.88: Impurity 3: RRT 0.67: 0.2% 0.3% 0.1% 0.1% 0.2% 0.7% 0.1% RRT 1.03: RRT 0.89: RRT 0.91: RRT 1.04: RRT 0.91: RRT 0.83: Impurity 2: 0.2% 0.1% 0.1% 0.2% 0.1% 0.3% 6.0% Impurity 4: RRT 0.91: RRT 0.93: Impurity 4: RRT 0.92: RRT 0.87: RRT 0.79: 0.3% 0.2% 0.1% 0.3% 0.1% 0.2% 0.6% Total: 2.4% RRT 0.93: RRT 1.04: Total: 3.4% RRT 0.94: RRT 0.88: Impurity 3: 0.2% 0.2% 0.2% 0.1% 0.6% RRT 1.04: Impurity 4: RRT 1.03: RRT 0.91: RRT 0.84: 0.2% 0.3% 0.2% 0.1% 0.9% RRT 1.06: Total: 3.2% Impurity 4: RRT 0.93: RRT 0.87: 0.1% 0.3% 0.2% 0.2% Impurity 4: Total: 5.2% RRT 1.03: RRT 0.89: 0.3% 0.3% 0.2% Total: 3.3% Impurity 4: RRT 0.90: 0.4% 0.1% Total: 11.8% RRT 0.91: 0.1% RRT 0.93: 0.3% RRT 1.04: 0.6% Impurity 4: 0.2% Total: 19.8% Water USP Meas-  1.6%  1.3%  1.5% 1.3%   1.1% 1.3%  1.5% con- <921> ured tent Ia value Dis- USP Meas- 1:59, 1:51, 1:40, 1:40, 1:23, 1:43, 1:25, 1:29, 1:43, 2:19, 1:21, 1:32, 1:59, 2:06, inte- <701> ured 1:38 1:46 1:29 1:36 2:20 1:36 2:15, gration value 1:51, 1:59, 1:52, 1:57, 1:35, 1:38, 1:22, 1:27, 2:22, 2:23, 1:43, 1:49, 2:18, 2:30, time 2:14 1:58 1.45 1:30 2:24 1:55 2:42  Average Average Average Average Average Average Average value: 1:55 value: 1:49 value: 1:36 value: 1:29 value: 2:15 value: 1:39 value: 2:18

Table 6 shows the stability test data of a capsule preparation of DFP-11207 (100 mg) according to the first prescription in severe conditions (30° C./humidity 65%).

As shown in the results, it was confirmed that the capsule preparation is stable for 3 months and not stable on and after 3 months. The appearance of the capsule preparation changed from grayish-white to slightly brown.

TABLE 6 Stability of capsule preparation of DFP-11207 (100 mg) according to the first prescription in severe conditions (30° C./65 RH) Specifications 0 month 1 month 2 months 3 months 6 months 9 months 12 months Analysis date Test Method 2016 Sep. 12 2016 Oct. 10 2016 Nov. 9 2017 Feb. 8 Appear- ATM- White, Grayish-white Grayish-white Grayish-white Grayish-white Slightly ance 1095 grayish- brown white or cream color Purity ATM- 90.0- 99.3% 95.8% 95.3% 92.7% 1349 110.0% Analog ATM- Individual Analog 1: 0.1% Analog 2: 0.3% Analog 2: 0.4% Analog 2: 0.7% 1349 related RRT 0.47: 0.1% Analog 1: 0.2% Analog 1: 0.3% RRT 0.36: 0.1% compounds: Impurity 1: 0.1% RRT 0.45: 0.1% RRT 0.45: 0.1% Analog 1: 0.5% Measured RRT 0.61: 0.1% Impurity 1: 0.3% Impurity 1: 0.5% Impurity 1: 1.0% value ≥ 0.1% Impurity 2: 0.4% RRT 0.59: 0.1% RRT 0.59: 0.1% Impurity 2: 2.3% (% area) Impurity 3: 0.4% Impurity 2: 0.8% Impurity 2: 1.6% RRT 0.79: 0.2% Total: RRT 0.88: 0.2% RRT 0.79: 0.1% RRT 0.79: 0.2% Impurity 3: 0.5% measured RRT 0.90: 0.1% Impurity 3: 0.4% Impurity 3: 0.4% RRT 0.84: 0.1% value RRT 0.92: 0.2% RRT 0.87: 0.2% RRT 0.87: 0.2% RRT 0.87: 0.2% RRT 0.94: 0.2% RRT 0.89: 0.1% RRT 0.89: 0.1% RRT 0.91: 0.1% RRT 1.03: 0.2% RRT 0.91: 0.2% RRT 0.91: 0.1% RRT 0.93: 0.2% Impurity 4: 0.3% RRT 0.93: 0.2% RRT 0.93: 0.1% RRT 1.04: 0.3% Total: 2.4% RRT 1.04: 0.2% RRT 1.04: 0.2% Impurity 4: 0.3% RRT 1.06: 0.1% Impurity 4: 0.3% Total: 6.5% Impurity 4: 0.3% Total: 4.6% Total: 3.6% Water USP Measured  1.6%  1.2%  1.5%  1.1% content <921> value Ia Disinte- USP Measured 1:59, 1:51, 1:38 2:02, 2:10, 2:16 1:43, 1:31, 1:39, 1:40, 1:37, 1:32, gration <701> value 1:51, 1:59, 2:14 2:16, 2:30, 2:31 1:35, 1:44, 1:22  1:18, 1:26, 1:28  time Average Average Average Average value: 1:55 value: 2:18 value: 1:36 value: 1:30

Example 2 Capsule Preparation (100 mg) of DFP-11207 According to the Second Prescription

Table 7 shows the types/amounts of components of a capsule preparation (100 mg) of DFP-11207 according to the second prescription, and packages thereof.

The capsule preparation of DFP-11207 (100 mg) was prepared in accordance with the second prescription. White and opaque hard HMPC capsules of No. 00 in size were filled with DFP-11207 (100 mg), microcrystalline cellulose (292.0 mg) and colloidal silicon dioxide (8.0 mg) to prepare 50 capsule preparations. The capsule preparations were put in a 150-cc bottle made of high density polyethylene (HDPE) with a 38-mm diameter mouth and having 3 bags of silica gel (1 g per bag) for drying purpose placed therein. The bottle was closed with a child resistant cap.

TABLE 7 Types and amounts of components of capsule preparation of DFP-11207 (100 mg) according to the second prescription and packages thereof 100-mg Capsule of DFP-11207 Component Manufacturer mg/capsule % w/w DFP-11207 — 100.0 25.0 Microcrystalline FMC 292.0 73.0 cellulose PH112, NF/EP/JP Colloidal silicon Evonik 8.000 2.0 dioxide, NF/EP/JP Filler content/capsule 400.0 100.0 Capsule Qualicaps Size No. 00 (white and opaque hard capsule made of HMPC) Bottle filled Drug & Child-resistant packaged 150-cc with capsules Plastics HDPE bottle with a 38 mm- diameter mouth Texas Bag containing silica gel (1 g) Technology for drying purpose Package Fifty capsules (100 mg) (silica gel (3 g) for drying purpose) per bottle

Table 8 shows long-term stability of a capsule preparation of DFP-11207 (100 mg) according to the second prescription at 5° C. and collection time (analysis time) of samples to be subjected to stability tests in acceleration conditions (25° C./humidity 60%) and severe conditions (30° C./humidity 65%).

TABLE 8 Analysis time of stability test samples of a capsule preparation of DFP-11207 (100 mg) according to the second prescription Number of test bottles Number Number Total Analysis time (month) of bottles of bottles number Conditions 0 1 2 3 6 9 12 18 24 36 48 60 72 84 tested maintained of bottles  5° C. A B A B A A A A A A A A 20 10 ^(c) 30 25° C./60% RH B B B A B A A A 12 6 18 30° C./65% RH B B B A B A  8 4 12 Whole sum of test bottles 60

Table 9 shows specifications of a capsule preparation of DFP-11207 (100 mg) according to the second prescription, stability test method and designation of test groups.

TABLE 9 Specifications of a capsule preparation of DFP-11207 (100 mg) according to the second prescription, stability test method and designation of test groups Number of test bottles Test Test group group Characteristics Method Specifications A B Appearance ATM-1095 White, grayish white, 1 1 cream color capsule Purity ATM-1349 90.0 - 110.0% Individual related Analog ATM-1349 compounds: ≥0.1% (% area) Total: measured value Water content USP <921> la Measured value Disintegration USP <701> Six individual time disintegration times and their average Microbial USP <61> Total Aerobic Microbial 1 content USP <62> Count (TAMC) ≤10³ cfu/g Total Combined Yeasts and Molds Count (TYMC) ≤10² cfu/g Escherichia coli: Absent Whole sum of test bottles 2 1

Table 10 shows data obtained in the middle of a long-term stability test (stability test in real time) of a capsule preparation of DFP-11207 (100 mg) according to the second prescription, performed at 5° C.

As shown in the results, the purity obtained after storage for 9 months at 5° C. was 103.7% (within a reference range of 90.0 to 110.0). It was estimated that a capsule preparation has long-term stability at 5° C.

TABLE 10 Stability (at 5° C.) of capsule preparation of DFP-11207 (100 mg) according to the second prescription in real time Specifications 0 month 3 months 6 months 9 months 12 months 18 months Analysis date Test Method 2020 Jul. 1 2020 Oct. 2 2021 Jan. 4 Appear- ATM- White, Grayish-white Grayish-white Grayish-white Grayish-white ance 1095 grayish- white or cream color Purity ATM- 90.0- 100.3% 103.3% 101.9% 103.7% 1349 110.0% Analog ATM- Individual Impurity 1: 0.1% Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.1% 1349 related Impurity 2: 0.3% Impurity 1: 0.1% Impurity 1: 0.1% Impurity 1: 0.4% compounds: Impurity 3: 0.5% Impurity 2: 0.3% Impurity 2: 0.4% Impurity 2: 0.3% Measured RRT 0.87: 0.1% Impurity 3: 0.5% Impurity 3: 0.5% RRT 0.81: 0.1% value ≥ RRT 0.90: 0.1% RRT 0.87: 0.1% RRT 0.87: 0.1% Impurity 3: 0.5% 0.1% RRT 0.91: 0.2% RRT 0.88: 0.1% RRT 0.90: 0.1% RRT 0.87: 0.1% (% area) RRT 0.93: 0.2% RRT 0.90: 0.2% RRT 0.91: 0.1% RRT 0.90: 0.1% Total: RRT 1.04: 0.1% RRT 0.91: 0.2% RRT 1.04: 0.1% RRT 0.91: 0.1% measured Impurity 4: 0.4% RRT 0.93: 0.1% Impurity 4: 0.4% RRT 0.93: 0.1% value RRT 1.31: 0.1% RRT 1.04: 0.1% RRT 1.31: 0.1% RRT 1.04: 0.2% RRT 1.32: 0.1% Impurity 4: 0.4% RRT 1.32: 0.1% Impurity 4: 0.4% RRT 1.53: 0.1% RRT 1.31: 0.1% Total: 2.1% Total: 2.4% Total: 2.3% RRT 1.32: 0.1% Total: 2.4% Water USP Measured  1.4%  2.0%  1.7%  1.7% content <921> value Ia Disinte- USP Average of 1:56, 2:18, 1:58, 1:33, 1:42, 1:45, 1:14, 1:35, 1:38, 1:23, 1:31, 1:37, gration <701> measured 1:46, 1:54, 2:29  2:00, 2:10, 2:18  1:45, 1:53, 2:03  1:46, 1:52, 2:16  time values Average value: Average value: Average value: Average value: 2:04 1:55 1:41 1:44 Micro- USP Total Aerobic Total Aerobic Total Aerobic bial <61> Microbial Count Microbial Count Microbial Count content USP (TAMC) ≤ 10³ (TAMC) ≤ 10 (TAMC) ≤ 10 <62> cfu/g Total cfu/g Total cfu/g Total Combined Combined Combined Yeasts and Yeasts and Yeasts and Molds Count Molds Count Molds Count (TYMC) ≤ (TYMC) ≤ (TYMC) ≤ 10² cfu/g 10 cfu/g 10 cfu/g Escherichia coli: Escherichia coli: Escherichia coli: Absent Absent Absent

Table 11-1 and Table 11-2 show data obtained in the middle of the stability test of a capsule preparation of DFP-11207 (100 mg) according to the second prescription in acceleration conditions (25° C./humidity 60%).

As shown in the results, it was estimated that the capsule preparation has long term stability for 9 months or more. Significant improvement was confirmed compared to the stable period (6 months) of the capsule preparation of DFP-11207 (100 mg) according to the first prescription in acceleration conditions (25° C./humidity 60%).

TABLE 11-1 Stability of capsule preparation of DFP-11207 (100 mg) according to the second prescription in acceleration conditions (25° C./60 RH) Specifications 0 month 1 month 2 months 3 months 6 months Analysis date Test Method 2020 May 1 2020 Jun. 1 2020 Jun. 1 2020 Oct. 2 Appear- ATM- White, Grayish-white Grayish-white Grayish-white Grayish-white Grayish-white ance 1095 grayish- white or cream color Purity ATM- 90.0- 100.3% 100.6% 102.8% 103.7% 104.5% 1349 110.0% Analog ATM- Individual Impurity 1: 0.1% Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.1% Analog 2: 0.1% 1349 related Impurity 2: 0.3% RRT 0.50: 0.1% Impurity 1: 0.1% Impurity 1: 0.3% Analog 1: 0.1% compounds: Impurity 3: 0.5% Impurity 1: 0.1% Impurity 2: 0.5% Impurity 2: 0.4% Impurity 1: 0.1% Measured RRT 0.87: 0.1% Impurity 2: 0.4% RRT 0.81: 0.1% Impurity 3: 0.5% Impurity 2: 0.9% value ≥ RRT 0.90: 0.1% RRT 0.81: 0.1% Impurity 3: 0.5% RRT 0.87: 0.1% RRT 0.81: 0.1% 0.1% RRT 0.91: 0.2% Impurity 3: 0.5% RRT 0.87: 0.1% RRT 0.88: 0.1% Impurity 3: 0.5% (% area ) RRT 0.93: 0.2% RRT 0.87: 0.1% RRT 0.88: 0.1% RRT 0.90: 0.2% RRT 0.87: 0.1% Total: RRT 1.04: 0.1% RRT 0.90: 0.1% RRT 0.90: 0.2% RRT 0.91: 0.2% RRT 0.90: 0.1% measured Impurity 4: 0.4% RRT 0.91: 0.2% RRT 0.91: 0.2% RRT 0.93: 0.1% RRT 0.91: 0.1% value RRT 1.31: 0.1% RRT 0.93: 0.1% RRT 0.93: 0.1% RRT 1.04: 0.1% RRT 0.93: 0.1% RRT 1.32: 0.1% RRT 0.94: 0.1% RRT 1.04: 0.1% Impurity 4: 0.5% RRT 1.04: 0.2% RRT 1.53: 0.1% RRT 1.04: 0.1% Impurity 4: 0.4% RRT 1.31: 0.1% Impurity 4: 0.4% Total: 2.3% Impurity 4: 0.4% RRT 1.31: 0.1% RRT 1.32: 0.1% RRT 1.24: 0.1% RRT 1.31: 0.1% RRT 1.32: 0.1% Total: 2.8% RRT 1.31: 0.1% RRT 1.32: 0.1% Total: 2.7% RRT 1.32: 0.1% RRT 1.41: 0.1% Total: 3.1% Total: 2.7% Water USP Measured  1.4%  1.6%  2.4%  1.7%  2.4% content <921> value Ia Disinte- USP Average of 1:56, 2:18, 1:58, 1:58, 1:41, 1:45, 2:08, 1:38, 1:48, 1:07, 1:14, 1:26, 1:08, 1:20, 1:31, gration <701> measured 1:46, 1:54, 2:29  1:50, 2:00, 2:25  2:15, 1:30, 2:01  1:40, 1:48, 2:02  1:44, 1:51, 1:59  time values Average value: Average value: Average value: Average value: Average value: 2:04 1:57 1:53 1:33 1:36 Micro- USP Total Aerobic Total Aerobic Total Aerobic bial <61> Microbial Count Microbial Count Microbial Count content USP (TAMC) ≤ 10³ (TAMC) ≤ 10 (TAMC) ≤ 10 <62> cfu/g Total cfu/g Total cfu/g Total Combined Combined Combined Yeasts and Yeasts and Yeasts and Molds Count Molds Count Molds Count (TYMC) ≤ (TYMC) ≤ (TYMC) ≤ 10² cfu/g 10 cfu/g 10 cfu/g Escherichia coli: Escherichia coli: Escherichia coli: Absent Absent Absent

TABLE 11-2 Stability of capsule preparation of DFP-11207 (100 mg) according to the second prescription in acceleration conditions (25° C./60 RH) Specifications 8 months 9 months 12 months 18 months 24 months Analysis date Test Method 2020 Dec. 4 2021 Jan. 4 Appear- ATM- White, Grayish-white Grayish-white ance 1095 grayish- white or cream color Purity ATM- 90.0- 101.9% 104.3% 1349 110.0% Analog ATM- Individual Analog 2: 0.1% Analog 2: 0.2% 1349 related Analog 1: 0.1% Analog 1: 0.1% compounds: Impurity 1: 0.4% Impurity 1: 0.6% Measured Impurity 2: 0.9% Impurity 2: 1.0% value ≥ RRT 0.81: 0.2% RRT 0.81: 0.2% 0.1% Impurity 3: 1.0% Impurity 3: 0.5% (% area) RRT 0.87: 0.1% RRT 0.87: 0.1% Total: RRT 0.90: 0.1% RRT 0.90: 0.1% measured RRT 0.91: 0.1% RRT 0.91: 0.1% value RRT 0.94: 0.1% RRT 0.93: 0.1% RRT 1.04: 0.2% RRT 1.04: 0.2% Impurity 4: 0.4% Impurity 4: 0.4% RRT 1.32: 0.2% Total: 3.6% Total: 3.9% Water USP Measured  1.5%  1.7% content <921> value Ia Disinte- USP Average of 1:50, 1:46, 1:52, 1:19, 1:29, 1:41, gration <701> measured 1:58, 2:10, 2:15  1:50, 1:59, 2:19  time values Average value: Average value: 1:59 1:46 Micro- USP Total Aerobic bial <61> Microbial Count content USP (TAMC) ≤ 10³ <62> cfu/g Total Combined Yeasts and Molds Count (TYMC) ≤ 10² cfu/g Escherichia coli: Absent

Table 12-1 and Table 12-2 further show data obtained in the middle of the stability test of a capsule preparation of DFP-11207 (100 mg) according to the second prescription in severe conditions (30° C./humidity 65%).

As shown in the results, it was estimated that the capsule preparation is stable for at least 9-months. Significant improvement was confirmed compared to the stable period (3 months) of the capsule preparation of DFP-11207 (100 mg) according to the first prescription in the severe conditions (30° C./humidity 65%).

TABLE 12-1 Stability of capsule preparation of DFP-11207 (100 mg) according to the second prescription in severe conditions (30° C./65% RH) Specifications 0 month 1 month 2 months 3 months 6 months Analysis date Test Method 2020 May 1 2020 Jun. 1 2020 Jun. 1 2020 Oct. 2 Appear- ATM- White, Grayish-white Grayish-white Grayish-white Grayish-white Grayish-white ance 1095 grayish- white or cream color Purity ATM- 90.0- 100.3% 101.7% 102.2% 104.1% 99.8% 1349 110.0% Analog ATM- Individual Impurity 1: 0.1% Analog 2: 0.1% Analog 2: 0.2% Analog 2: 0.1% Analog 2: 0.3% 1349 related Impurity 2: 0.3% RRT 0.50: 0.1% Analog 1: 0.1% Analog 1: 0.1% Analog 1: 0.2% compounds: Impurity 3: 0.5% Impurity 1: 0.2% Impurity 1: 0.1% Impurity 1: 0.2% Impurity 1: 0.4% Measured RRT 0.87: 0.1% Impurity 2: 0.5% Impurity 2: 0.7% Impurity 2: 0.8% Impurity 2: 1.8% value ≥ RRT 0.90: 0.1% RRT 0.81: 0.1% RRT 0.81: 0.2% RRT 0.81: 0.1% RRT 0.81: 0.3% 0.1% RRT 0.91: 0.2% Impurity 3: 0.5% Impurity 3: 0.5% Impurity 3: 0.5% Impurity 3: 0.5% (% area) RRT 0.93: 0.2% RRT 0.87: 0.1% RRT 0.87: 0.1% RRT 0.87: 0.1% RRT 0.90: 0.1% Total: RRT 1.04: 0.1% RRT 0.90: 0.1% RRT 0.88: 0.1% RRT 0.88: 0.1% RRT 0.91: 0.1% measured Impurity 4: 0.4% RRT 0.91: 0.2% RRT 0.90: 0.2% RRT 0.90: 0.2% RRT 0.93: 0.2% value RRT 1.31: 0.1% RRT 0.93: 0.1% RRT 0.91: 0.2% RRT 0.91: 0.2% RRT 1.04: 0.2% RRT 1.32: 0.1% RRT 0.94: 0.1% RRT 0.93: 0.1% RRT 0.93: 0.1% Impurity 4: 0.4% RRT 1.53: 0.1% RRT 1.04: 0.1% RRT 1.04: 0.1% RRT 1.04: 0.1% RRT 1.32: 0.1% Total: 2.3% Impurity 4: 0.4% Impurity 4: 0.4% Impurity 4: 0.4% Total: 4.6% RRT 1.31: 0.1% RRT 1.31: 0.1% RRT 1.31: 0.1% RRT 1.32: 0.1% RRT 1.32: 0.1% RRT 1.32: 0.1% RRT 1.48: 0.1% Total: 3.2% Total: 3.2% Total: 2.9% Water USP Measured  1.4%  1.6%  2.2%  1.8%  1.9% content <921> value Ia Disinte- USP Average of 1:56, 2:18, 1:58, 1:50, 2:26, 2:38, 1:47, 1:56, 1:25, 2:09, 1:32, 1:38, 0:59, 1:16, 1:21, gration <701> measured 1:46, 1:54, 2:29  2:02, 1:58, 2:10  2:08, 1:37, 2:14  1:50, 2:06, 2:13  1:28, 1:34, 1:41  time values Average Average Average Average Average value: value: 2:04 value: 2:11 value: 1:51 value: 1:55 1:23 Micro- USP Total Aerobic Total Aerobic Total Aerobic bial <61> Microbial Count Microbial Count Microbial Count content USP (TAMC) ≤ 10³ (TAMC) ≤ 10 (TAMC) ≤ 10 <62> cfu/g Total cfu/g Total cfu/g Total Combined Combined Combined Yeasts and Yeasts and Yeasts and Molds Count Molds Count Molds Count (TYMC) ≤ (TYMC) ≤ (TYMC) ≤ 10² cfu/g 10 cfu/g 10 cfu/g Escherichia coli: Escherichia coli: Escherichia coli: Absent Absent Absent

TABLE 12-2 Stability of capsule preparation of DFP-11207 (100 mg) according to the second prescription in severe conditions (30° C./65% RH) Specifications 9 months 12 Test Method Analysis date 2021 Jan. 4 months Appearance ATM-1095 White, grayish- Grayish-white white or cream color Purity ATM-1349 90.0-110.0% 98.4% Analog ATM-1349 Individual Analog 2: 0.6% related RRT 0.35: 0.1% compounds: Analog 1: 0.3% Measured value Impurity 1: 1.1% ≥0.1% Impurity 2: 2.9% (% area) RRT 0.74: 0.1% Total: measured RRT 0.81: 0.3% value Impurity 3: 0.5% RRT 0.90: 0.1% RRT 0.91: 0.1% RRT 0.93: 0.2% RRT 1.04: 0.3% Impurity 4: 0.4% RRT 1.31: 0.1% Total: 7.1% Water USP Measured value 1.7% content <921>la Disinte- USP<701> Average of 1: 13, 1:28, 1:36, gration measured values 1: 46, 1:59, 2:08 time Average value: 1:41 Microbial USP <61> Total Aerobic content USP <62> Microbial Count (TAMC) ≤10³ cfu/g Total Combined Yeasts and Molds Count (TYMC) ≤10² cfu/g Escherichia coli: Absent

The results of a stability test of DFP-11207 bulk drug not encapsulated are shown in Table 13. The stable period of DFP-11207 bulk drug, during which the specifications of the bulk drug are satisfied, in the acceleration conditions (25° C./humidity 60%) was 3 months or less. The stable period of capsule preparation of DFP-11207 according to the first prescription satisfying the specifications of the preparation in the acceleration conditions (25° C./humidity 60%) was 6 months. The stable period of capsule preparation of DFP-11207 according to the second prescription satisfying the specifications of the preparation in the acceleration conditions (25° C./humidity 60%) was 9 months or more. In comparison with these preparations, the bulk drug was unstable.

TABLE 13 Results of stability test of a bulk drug, DFP-11207 in humidity conditions (25° C./60% RH) Passing Test item Specifications Results (after 3 months) status Appearance Grayish-white Grayish-white Passed to pale yellow Purity ≥96.0% 94.0% Not (% area) passed Analog Individual Relative elution time % area Not (% area) impurities: 0.30 0.27% passed ≤1.0% Analog-1 (RRT 0.42) 0.18% Impurity 1 (RRT 0.49) 0.73% Impurity 2 (RRT 0.74) 2.13% 0.80 0.21% Impurity 3 (RRT 0.83) 0.49% 0.88 0.07% 0.89 0.05% 0.90 0.10% 0.92 0.15% 0.93 0.13% 0.94 0.05% 1.03 0.22% Impurity 4 (RRT 1.13) 0.86% 1.29 0.06% 1.30 0.09% Total 5.8% Not impurities: passed ≤4.0% Water ≤0.5% 0.2% Passed content

INDUSTRIAL APPLICABILITY

Since DFP-11207 is sensitive to humidity, it has been considered that DFP-11207 may not be stably stored for a long term at normal temperature and normal humidity; however, long-term stable storage of DFP-11207 was realized by a new technique not known in the technical field. Based on this, it is likely to stably supply a DFP-11207 product to the market of pharmaceuticals via approval of manufacturing and marketing as a pharmaceutical product. Furthermore, the product can be stored for a long term at hospitals for treating cancer patients and problems of transport of the product have been overcome. Moreover, the present invention realized excellent stability that allows cancer patients to store prescribed drugs (one month's drug prescribed by doctors of hospitals in consideration of the conditions of patients) at room temperature (25° C./humidity 50%) or in a refrigerator (5° C.) at homes. Since the present invention can provide an excellent product of DFP-11207, the invention is extremely beneficial for the pharmaceutical industry. 

1. A capsule preparation for treating cancer, comprising 5-chloro-2-(3-(3-(ethoxymethyl)-5-fluoro-2,6-dioxo-1,2,3,6-tetrahydopy-rimidine-1-carbonyl)benzoyloxy)pyridine-4-yl-2,6-bis(propionyloxy)isonicotinate (DFP-11207) or a pharmaceutically acceptable salt thereof and a hygroscopic agent, wherein the capsule preparation is provided in a container together with a drying agent which is separate from the capsule preparation.
 2. The capsule preparation according to claim 1, wherein the hygroscopic agent includes colloidal silicon dioxide and microcrystalline cellulose.
 3. The capsule preparation according to claim 1, which comprises the DFP-11207 or a pharmaceutically acceptable salt thereof in an amount of 25 to 65 wt %, microcrystalline cellulose in an amount of 35 to 75 wt % and colloidal silicon dioxide in an amount of 2 to 5 wt %.
 4. The capsule preparation according to claim 1, which comprises the DFP-11207 or a pharmaceutically acceptable salt thereof in an amount of 100 mg.
 5. The capsule preparation according to claim 1, wherein a coating base for a capsule shell thereof contains hydroxypropyl methylcellulose.
 6. The capsule preparation according to claim 1, which has a capsule size of 2 to
 00. 7. (canceled)
 8. A method for producing a capsule preparation for treating cancer, comprising filling a capsule shell with 5-chloro-2-(3-(3-(ethoxymethyl)-5-fluoro-2,6-dioxo-1,2,3,6-tetrahydopy-rimidine-1-carbonyl)benzoyloxy)pyridine-4-yl-2,6-bis(propionyloxy)isonicotinate (DFP-11207) or a pharmaceutically acceptable salt thereof and a hygroscopic agent, and providing the produced capsule preparation in a container together with a drying agent which is separate from the capsule preparation.
 9. (canceled) 